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For the Inventor, By the Inventor

Osaka, Japan

Olfa Corporation


USPTO Granted Patents = 28



Trademarks = 7

Forward Citations = 309

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5 inventors (with patents filed for the assignee):

goldMedal Shoji Okada (14 out of 21 patents)

silverMedal Yosuke Takashima (7 out of 7 patents)

bronzeMedal Toshiyuki Watanabe (6 out of 21 patents)

4.  Minoru Masuda (3 out of 76 patents)

5.  Hiroshi Okada (1 out of 1 patent)


28 patents:

1. 12427680 - Safety cutter knife (2025-09-30),
2. D1028668 - Replacement blade for a cutter knife (2024-05-28),
3. D964137 - Cutter knife (2022-09-20),
4. D899886 - Cutter knife (2020-10-27),
5. D847605 - Cutter knife (2019-05-07),
6. 10279489 - Full metal cutter knife (2019-05-07),
7. D790313 - Cutter knife (2017-06-27),
8. D717150 - Cutter knife (2014-11-11),
9. 8727195 - Blade snap-off holder (2014-05-20),
10. D691868 - Rotary cutter (2013-10-22),
11. D656381 - Cutter knife (2012-03-27),
12. 7942395 - Rotary cutting mat (2011-05-17),
13. 7765701 - Safety cutter knife (2010-08-03),
14. D606837 - Cutter knife (2009-12-29),
15. 7540094 - Cutter knives for slash-quilts (2009-06-02),
Olfa Corporation is a leading manufacturer of cutting tools and accessories for both industrial and consumer use. With a history dating back to 1956, Olfa has been consistently delivering high-quality products that meet the needs of professionals and hobbyists alike. The company is known for its innovative designs and commitment to customer satisfaction.
This text is generated by artificial intelligence and may not be accurate.

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USPTO Data Jan 1 1976 - Jan 6 2026

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28 Patents

#229 in Osaka

#2,357 in Japan

#22,583 in the World

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Osaka, Japan

Olfa Corporation

Forward Citations = 309

5 inventors:

goldMedal Shoji Okada (14 out of 21 patents)

silverMedal Yosuke Takashima (7 out of 7 patents)

bronzeMedal Toshiyuki Watanabe (6 out of 21 patents)

4.  Minoru Masuda (3 out of 76 patents)

5.  Hiroshi Okada (1 out of 1 patent)

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